Campbell Essential Biology (7th Edition)
Campbell Essential Biology (7th Edition)
7th Edition
ISBN: 9780134765037
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece
Publisher: PEARSON
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Chapter 17, Problem 3SQ

The oldest group of tetrapods is the _____.

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Having _______ is a synapomorphy of bilaterians.      collagen     the ability to move     a notochord     3 germ layers
Scales of modern teleosts differ from the ancestral state in that they _____.     are thicker and provide better protection   are thinner and more flexible
Which trait listed below is found in all the Molluscan classes that we studied (Polyplacophora, Gastropoda, Bivalvia, Cephalopoda)? The ability to live in freshwater Torsion A radula Mantle tissue An external shell
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